28349539 has 8 divisors (see below), whose sum is σ = 29891840. Its totient is φ = 26812296.

The previous prime is 28349479. The next prime is 28349549. The reversal of 28349539 is 93594382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28349539 - 2¹⁹ = 27825251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28349495 and 28349504.

It is not an unprimeable number, because it can be changed into a prime (28349549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17602 + ... + 19144.

It is an arithmetic number, because the mean of its divisors is an integer number (3736480).

Almost surely, 2^28349539 is an apocalyptic number.

28349539 is a deficient number, since it is larger than the sum of its proper divisors (1542301).

28349539 is a wasteful number, since it uses less digits than its factorization.

28349539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529.

The product of its digits is 233280, while the sum is 43.

The square root of 28349539 is about 5324.4285139346. The cubic root of 28349539 is about 304.9172542711.

The spelling of 28349539 in words is "twenty-eight million, three hundred forty-nine thousand, five hundred thirty-nine".